7 Further, they must also confess either that He is mere vacuity, or that the entire universe is within Him; and in that case all will in like degree partake of the Father. Just as, if one forms circles in water, or round or square figures, all these will equally partake of water; just as those, again, which are framed in the air, must necessarily partake of air, and those which [are formed] in light, of light; so must those also who are within Him all equally partake of the Father, ignorance having no place among them. Where, then, is this partaking of the Father who fills [all things]? If, indeed, He has filled [all things], there will be no ignorance among them. On this ground, then, their work of [supposed] degeneracy is brought to nothing, and the production of matter with the formation of the rest of the world; which things they maintain to have derived their substance from passion and ignorance. If, on the other hand, they acknowledge that He is vacuity, then they fall into the greatest blasphemy; they deny His spiritual nature. For how can He be a spiritual being, who cannot fill even those things which are within Him?
Source: Adversus haereses (New Advent)